Tip generously and you'll have an easier time not only getting a bartender's attention but also possibly sweet buybacks. This graphic from Thrillist reveals how to tip a bartender like a boss.

Tipping is a strange practice with no hard-and-fast rules, but these guidelines—from a bartender—should keep you in the bartender's good graces. Hit up the link below for the full graphic, which includes advice like starting the night off right with a "please take care of me tonight" bonus of 50 to 100% of the first round. Also, note that these aren't for your basic bar tips—they're if you want to be remembered by the bartender.